Westminster, MD Radon Mitigation and Testing
Westminster in Carroll County shows an average radon level of 14.5 pCi/L based on local testing data, significantly exceeding the EPA action level of 4.0 pCi/L. Located within the Baltimore Metro area, the community sits on Piedmont geology where crystalline bedrock contributes to elevated radon potential. Homes in zip codes 21157 and 21158 should prioritize radon testing and mitigation, as the region's basement-heavy housing stock can trap significant radon concentrations.
Based on 4 user-submitted radon tests for homes in Westminster, MD. The EPA recommends taking action at or above 4.0 pCi/L.
Westminster, MD Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Westminster, MD Radon Testing
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Westminster, Maryland Radon Levels
User-submitted radon test readings from homes in the Westminster area.
| Radon Level | City | Home Age | Foundation | Submitted |
|---|---|---|---|---|
| 20 pCi/L | Westminster, MD | 21-50 Years | Full Basement | Dec 2021 |
| 9 pCi/L | Westminster, MD | 100+ Years | Full Basement | Aug 2021 |
Have a radon test result for Westminster? Submit your reading to help other homeowners.
Westminster Radon Facts
Key details about the radon risk profile for Westminster and the 21157 zip code area.
Westminster and the 21157 zip code are located in Carroll County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.
Radon FAQ for Westminster, MD
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Most Active Radon Markets in Maryland
Cities with the most user-submitted radon test data in the state.
| City | Avg User Radon Level | Submissions |
|---|---|---|
| Frederick | 8.29 pCi/L | 7 |
| Potomac | 9.00 pCi/L | 6 |
| Hagerstown | 8.67 pCi/L | 6 |
| Westminster | 14.50 pCi/L | 4 |
| Baltimore | 7.00 pCi/L | 4 |
| Annapolis | 4.25 pCi/L | 4 |
| Upper Marlboro | 15.00 pCi/L | 3 |
| Edgewater | 12.67 pCi/L | 3 |
| Bowie | 9.00 pCi/L | 3 |
| Clarksburg | 8.00 pCi/L | 3 |
| Gambrills | 6.00 pCi/L | 3 |
| Elkton | 5.33 pCi/L | 3 |
| Silver Spring | 4.33 pCi/L | 3 |
| Chesapeake Beach | 14.00 pCi/L | 2 |
| Cumberland | 9.00 pCi/L | 2 |
| Frostburg | 9.00 pCi/L | 2 |
| Owings | 5.50 pCi/L | 2 |
| Huntingtown | 4.50 pCi/L | 2 |
| Mc Henry | 20.00 pCi/L | 1 |
| Mount Airy | 20.00 pCi/L | 1 |